Any problems or issues with long haul towing and hauling, at the same time, the maximum weight limits in the bed and on a trailer?

That would be ~1600lbs in the bed and cab combined, with a trailer payload equal to the max rated trailer capacity for the F150 5.4L.

For say...4500 miles?

I would assume that everything would be OK with no ill-effects on the truck as long as the truck came with the towing package (tranny fluid cooler, etc.).

Anyone ever do this kind of thing?

Thanks,

DT.